The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.
for it." Otherwise the obvious fraud opportunity would easily wipe out the
，更多细节参见搜狗输入法2026
争分夺秒重建家园，第一时间开通防返贫监测“绿色通道”，逐户制定“一户一策”帮扶计划……全国上下众志成城，希望在残垣瓦砾间迅速升起。
2.2.2 面向对象重构版本（oop_crawler.py）